featreq: multisig e2e encryption #1527
Description
If we want to push multisig, I think we need to consider implementing end-to-end encryption at some point, to avoid having to worry about database confidentiality and remove a target from our backs.
For example, the data is encrypted client-side with the public keys of all multisig members, and only ciphertext is stored in the transaction list on the backend.
As a first step, we could push further to minimize metadata.